Materials Science and Engineeringhttps://repository.iitgn.ac.in/handle/123456789/567
Mon, 21 Jan 2019 22:55:03 GMT2019-01-21T22:55:03ZTailoring of structural and photoluminescence emissions by Mn and Cu co-doping in 2D nanostructures of ZnS for visualization of latent fingerprints and generation of white lighthttps://repository.iitgn.ac.in/handle/123456789/4212
Tailoring of structural and photoluminescence emissions by Mn and Cu co-doping in 2D nanostructures of ZnS for visualization of latent fingerprints and generation of white light
Kumbhakar, Partha; Biswas, Subrata; Pandey, Prafull; Tiwary, Chandra Sekhar; Kumbhakar, Pathik
There is a recent demand in development of luminescent materials for visualizations of latent fingerprints (LFPs) for achieving enhanced security. Also recently there has been a new research trend on developments of 2D materials from non-layered semiconductors with strong luminescence properties in the visible region. The conventional growth process of luminescent materials limits its capacity of tuning the structure and light emission efficiency. However, multi-atom doping provides an additional degree of freedom to tune the basic morphologies and optical properties of luminescent semiconductors by controlling the defect levels. Here, by a simple chemical technique multi-atom (Cu and Mn) doped rarely reported 2D nanosheets of zinc sulphide (ZnS) have been grown. Thus a stable high ?uorescence efficiency of ~62% in the visible region has been realized for visualization of LFPs. Further near-white light emission has been demonstrated by coating the synthesized materials with a suitable doping concentration on a commercially available UV-LED chip. The proposed technique may be utilized further to build-up other 2D nanostructured materials for multifunctional applications in solid state lighting, LFPs and in forensic sciences.
Sat, 01 Dec 2018 00:00:00 GMThttps://repository.iitgn.ac.in/handle/123456789/42122018-12-01T00:00:00ZPrecipitation kinetic model and its applications to Mg alloyshttps://repository.iitgn.ac.in/handle/123456789/4204
Precipitation kinetic model and its applications to Mg alloys
Paliwal, Manas; Jung, In-Ho
Fri, 01 Mar 2019 00:00:00 GMThttps://repository.iitgn.ac.in/handle/123456789/42042019-03-01T00:00:00ZAntibacterial activity of antimicrobial peptide (AMP) grafted polystyrene surfacehttps://repository.iitgn.ac.in/handle/123456789/4202
Antibacterial activity of antimicrobial peptide (AMP) grafted polystyrene surface
Majhi, Sasmita; Arora, Ankita; Mishra, Abhijit
Bacterial colonization and infections associated with biomaterial surfaces pose common threat to patient safety and health care. Antibacterial coating on such surfaces provides significant approach toward addressing this clinical issue. Antimicrobial peptides (AMPs) are suitable alternative to conventional antibiotics because of their broad-spectrum antimicrobial activity, low propensity toward pathogen resistance, and low immune response. In this study, a designed peptide, CKLLLRLRKLLRR (CKLR), is immobilized on maleimide-activated polystyrene plates via maleimide–thiol reaction of the sulfhydryl (–SH) group available at its N-terminal. Qualitative screening method including colony-forming units (CFU) assay is performed in 96-well plate to evaluate antibacterial efficacy of immobilized CKLR. Bacterial viability assays show nearly 100% reduction in the growth of both Escherichia coli and Staphylococcus aureus. Findings of this study indicate that CKLR is potent to develop infection-resistant biomaterial surfaces. Such efficient immobilization strategies can be tailored to eliminate bacterial infections arising from surfaces, thereby rendering antimicrobial biomaterials.
Thu, 01 Nov 2018 00:00:00 GMThttps://repository.iitgn.ac.in/handle/123456789/42022018-11-01T00:00:00ZAntimicrobial activity of curcumin based on a novel peptide delivery systemhttps://repository.iitgn.ac.in/handle/123456789/4201
Antimicrobial activity of curcumin based on a novel peptide delivery system
Ratrey, Poonam; Dalvi, Sameer; Mishra, Abhijit
Thu, 20 Dec 2018 00:00:00 GMThttps://repository.iitgn.ac.in/handle/123456789/42012018-12-20T00:00:00Z